When Japanese people count the number of rabbit, they commonly use one of 2 different units, 匹(hiki) and 羽(wa). Besides, people who live in some specific regions, also used 耳(mimi) for that.

羽(wa) means a wing and people normally use that unit to count the number of birds. So, counting rabbits by 羽(wa) appears to be unreasonable as it seems.

Three explanations can tell us about why Japanese count rabbits by 羽(wa).

First explanation is that rabbits look like they have only 2 legs when they stand up. Second is that their ears look like wings. Third is that the Japanese word of a rabbit, ウサギ(USAGI) is compounded of bird's names, a cormorant(U：鵜) and a snowy heron(SAGI：鷺).

lucas21cIf there are some errors or awkward expressions, please correct them.

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When Japanese people count the number of rabbit, they commonly use one of 2 different units, 匹(hiki) and 羽(wa). Besides, people who live in some specific regions, also used 耳(mimi) for that.

羽(wa) means a wing and people normally use that unit to count the number of birds. So, counting rabbits by 羽(wa) appears to be unreasonable as it seems.

Three explanations can tell us about why Japanese count rabbits by 羽(wa).

First explanation is that rabbits look like they have only 2 legs when they stand up. Second is that their ears look like wings. Third is that the Japanese word of a rabbit, ウサギ(USAGI) is compounded of bird's names, a cormorant(U：鵜) and a snowy heron(SAGI：鷺).

When Japanese people count rabbits, they commonly use one of 2 different units, 匹(hiki) or 羽(wa). In addition, people who live in some specific regions, also used 耳(mimi) for that. (OR: In additional, there is regionalized use of 耳(mimi).) 羽(wa) means "wing" and people normally use that unit to count the number of birds. So, counting rabbits using by 羽(wa) appears to be unreasonable as it seems. However, there are three explanations that can tell us aboutsuggest why Japanese count rabbits using 羽(wa).

The first explanation is that rabbits look like they have only 2 legs when they stand up. The second is that their ears look like wings. The third is that the Japanese word for "rabbit," ウサギ(USAGI) is a compounded of two birds' names, a cormorant(U：鵜) and a snowy heron(SAGI：鷺).

I have one more question about your reply. Is "In additional" also acceptable? I think it should probably be "In addtionally". And I would like to add the sentence, "However, all of these are just a theory, yet." to the end. Please also check this.